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		<title>实验1-3</title>
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			1.<i>斜体字</i>
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			2.<b>粗体字</b>
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			3.a<sup>上标</sup>，b<sub>下标</sub>
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			4.原价：<del>199元</del>，<ins>99元</ins>
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			5.预格式化<pre>
  123045
1345768827
  7752
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